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