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