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