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