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