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