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