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