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