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