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