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