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