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