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