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