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