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