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