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