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