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