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