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