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