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)(11,13)(12,14)(15,16)(17,18,21,25)(19,27,29,23)(20,31,34,24)(22,26,35,42)(28,43,36,38)(30,39,33,41)(32,44,37,40)(45,47,46,48)(1,3)(2,5)(4,8)(6,7)(9,11,12,15)(10,13,14,16)(19,28)(20,32)(22,35)(23,38)(24,40)(26,42)(27,43)(29,36)(31,44)(34,37)(45,46)(47,48)(10,14)(13,16)(17,19)(18,23)(20,33)(21,29)(22,36)(24,41)(25,27)(26,43)(28,35)(30,34)(31,39)(32,46)(37,45)(38,42)(40,48)(44,47) involution — undirected(2,6)(5,7)(19,29)(23,27)(28,36)(30,33)(38,43)(39,41)(45,46)(47,48) involution — undirected(3,8)(5,7)(17,20,21,34)(18,24,25,31)(19,30,29,33)(22,37,35,32)(23,39,27,41)(26,44,42,40)(28,45,36,46)(38,47,43,48)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.