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