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