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