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