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