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