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