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