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