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