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