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