One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,8)(5,6)(10,14)(15,16)(17,18)(19,23)(20,24)(21,25)(22,26)(27,29)(28,31)(30,32) involution — undirected(9,10,13,14)(11,15,12,16)(17,19,22,24)(18,23,26,20)(21,27,30,31)(25,29,32,28)(2,6)(7,8)(17,18,22,26)(19,20,24,23)(21,25,30,32)(27,28,31,29)(1,2)(3,7)(4,8)(5,6)(9,11,13,12)(10,15,14,16)(17,18)(19,23)(20,24)(21,25)(22,26)(27,29)(28,31)(30,32)(1,3,5,4)(2,7,6,8)(9,11,13,12)(10,15,14,16)(17,20,22,23)(18,24,26,19)(21,29,30,28)(25,27,32,31)(1,4,5,3)(2,8,6,7)(9,12,13,11)(10,16,14,15)(17,21,22,30)(18,25,26,32)(19,27,24,31)(20,28,23,29)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.