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