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