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