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