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)(17,18)(19,26)(20,24)(21,22)(23,30)(25,27)(28,31)(29,32)(1,3)(2,6)(4,7)(5,8)(10,13)(11,15)(18,22)(23,31)(24,25)(26,32) involution — undirected(1,2,5,4)(3,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19,27,28,21,29,20,30)(18,23,24,32,22,31,25,26)(1,4,5,2)(3,6,8,7)(10,13)(14,16)(17,18)(19,23)(20,25)(21,22)(24,27)(26,30)(28,32)(29,31)(9,11,12,15)(10,14,13,16)(17,20,21,27)(18,24,22,25)(19,28,29,30)(23,26,31,32)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.