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