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