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