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