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