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