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