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