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