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