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