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