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