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