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