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