One vertex per element, one color per generator, with an edge from x to x·s.
(3,9)(7,14)(10,12)(15,16)(17,18)(19,26)(20,24)(21,25)(22,23)(27,29)(28,32)(30,31)(33,34)(35,38)(36,43)(37,40)(39,44)(41,47)(42,46)(45,48) involution — undirected(1,2)(3,7)(4,11)(5,6)(8,13)(9,14)(10,16)(12,15)(17,19)(18,20)(21,27)(22,26)(23,24)(25,28)(29,30)(31,32)(33,35,37,42)(34,38,40,46)(36,41,44,48)(39,45,43,47)(2,6)(7,14)(8,11)(15,16)(18,22)(20,26)(25,30)(28,29)(33,34,37,40)(35,38,42,46)(36,39,44,43)(41,45,48,47)(1,3,5,9)(2,7,6,14)(4,12,13,10)(8,16,11,15)(17,20,23,26)(18,24,22,19)(21,29,31,28)(25,27,30,32)(33,34)(35,38)(36,39)(37,40)(41,45)(42,46)(43,44)(47,48)(1,4)(2,8)(3,10)(5,13)(6,11)(7,15)(9,12)(14,16)(17,21,23,31)(18,25,22,30)(19,27,24,32)(20,28,26,29)(33,35)(34,38)(36,41)(37,42)(39,45)(40,46)(43,47)(44,48)(1,2)(3,7)(4,8)(5,6)(9,14)(10,15)(11,13)(12,16)(17,22,23,18)(19,26,24,20)(21,30,31,25)(27,29,32,28)(33,36,37,44)(34,39,40,43)(35,41,42,48)(38,45,46,47)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.