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