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