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