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