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