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)(11,15)(12,14)(13,16)(17,18,22,26)(19,23,28,36)(20,30,32,45)(21,34,31,25)(24,38,39,33)(27,40,42,48)(29,44,41,37)(35,46,47,43)(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,16)(14,15)(17,19,22,28)(18,23,26,36)(20,27,32,42)(21,29,31,41)(24,35,39,47)(25,37,34,44)(30,40,45,48)(33,43,38,46)(1,2)(3,5)(4,6)(7,8)(11,16)(13,15)(17,20,31,38,22,32,21,33)(18,24,34,45,26,39,25,30)(19,27,41,46,28,42,29,43)(23,35,44,48,36,47,37,40)(2,6)(5,7)(10,14)(13,15)(19,28)(20,32)(23,36)(24,39)(29,41)(30,45)(33,38)(37,44) involution — undirected(3,8)(5,7)(20,32)(24,39)(27,42)(30,45)(33,38)(35,47)(40,48)(43,46) involution — undirectedA 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.