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