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