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