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