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