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