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