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