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