One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,3)(5,6,10,14)(7,12,16,20)(8,13,9,11)(15,18,17,19)(21,22,26,30)(23,31,32,35)(24,29,25,28)(27,34,36,33)(6,11)(8,9)(12,18)(13,14)(15,17)(19,20)(21,23)(22,27)(24,34)(25,33)(26,32)(28,35)(29,31)(30,36) involution — undirected(5,7)(6,12)(8,17)(9,15)(10,16)(11,18)(13,19)(14,20)(22,28)(24,25)(27,35)(29,30)(31,36)(33,34) involution — undirected(1,3,4,2)(5,8,10,9)(6,13,14,11)(7,15,16,17)(12,18,20,19)(23,32)(27,36)(31,35)(33,34)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.