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