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