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