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