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