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