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