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