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