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