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