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