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