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