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