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