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