One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9)(3,11,12,15)(4,7,5,10)(8,14,16,13)(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)(2,7)(4,5)(8,15)(9,10)(11,16)(13,14)(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(1,3)(2,8)(4,13)(5,14)(6,12)(7,15)(9,16)(10,11)(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)(3,12)(7,10)(13,14)(20,31)(24,38)(28,42)(32,44)(36,47)(39,45)(41,48)(43,46) involution — undirected(1,4,6,5)(2,7,9,10)(3,13,12,14)(8,15,16,11)(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.