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