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