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