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