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