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