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