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