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