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