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