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