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