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