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