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