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