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