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