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