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