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