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