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