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