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