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