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