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