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