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