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