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