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