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