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