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