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