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