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