One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,13)(5,9)(7,10)(8,12)(11,16)(14,15)(17,18)(19,26)(20,24)(21,25)(22,23)(27,29)(28,32)(30,31)(33,34)(35,39)(36,37)(38,42)(40,45)(41,48)(43,44)(46,47) involution — undirected(1,3)(2,6)(4,5)(7,11)(8,14)(9,13)(10,16)(12,15)(17,19)(18,20)(21,27)(22,26)(23,24)(25,28)(29,30)(31,32)(33,35)(34,39)(36,43)(37,44)(38,45)(40,42)(41,46)(47,48) involution — undirected(3,11)(4,12)(6,16)(8,13)(18,22)(20,26)(25,30)(28,29)(33,35,38,45)(34,40,42,39)(36,43,41,46)(37,47,48,44)(1,4)(2,8)(3,5)(6,14)(7,12)(9,16)(10,13)(11,15)(17,20,23,26)(18,24,22,19)(21,29,31,28)(25,27,30,32)(33,35)(34,40)(36,46)(37,44)(38,45)(39,42)(41,43)(47,48)(1,5)(2,9)(3,12)(4,11)(6,8)(7,15)(10,14)(13,16)(17,21,23,31)(18,25,22,30)(19,27,24,32)(20,28,26,29)(33,36,38,41)(34,37,42,48)(35,43,45,46)(39,44,40,47)(1,6)(2,3)(4,14)(5,8)(7,16)(9,12)(10,11)(13,15)(17,22,23,18)(19,26,24,20)(21,30,31,25)(27,29,32,28)(33,37)(34,41)(35,44)(36,42)(38,48)(39,46)(40,43)(45,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.