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