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