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)(11,15)(12,13)(14,16)(17,18,22,24)(19,25,26,20)(21,23,30,32)(27,31,29,28)(1,2)(3,6)(4,7)(5,8)(17,19)(18,20)(21,29)(22,26)(23,31)(24,25)(27,30)(28,32) involution — undirected(10,13)(14,15)(19,26)(20,25)(27,29)(28,31) involution — undirected(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,19)(18,20)(21,27)(22,26)(23,28)(24,25)(29,30)(31,32)(9,11)(10,14)(12,16)(13,15)(17,20)(18,19)(21,28)(22,25)(23,27)(24,26)(29,32)(30,31) involution — undirected(1,4,5,3)(2,7,8,6)(17,21,22,30)(18,23,24,32)(19,27,26,29)(20,28,25,31)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.