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