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