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