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)(17,18,22,27,23,26,38,28)(19,29,32,40,31,46,33,48)(20,25,34,44,35,43,21,36)(24,39,41,47,42,37,45,30)(1,3)(2,7)(4,9)(5,11)(6,12)(8,10)(13,16)(14,15)(17,19)(18,24)(20,30)(21,37)(22,32)(23,31)(25,40)(26,42)(27,41)(28,45)(29,36)(33,38)(34,39)(35,47)(43,48)(44,46) involution — undirected(1,4,6,10,5,13,14,7)(2,3,9,12,8,11,16,15)(17,20,22,34,23,35,38,21)(18,25,27,44,26,43,28,36)(19,30,32,39,31,47,33,37)(24,40,41,46,42,48,45,29)(3,11)(4,13)(7,10)(12,15)(18,26)(19,31)(25,43)(27,28)(30,47)(32,33)(36,44)(37,39) 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.