One vertex per element, one color per generator, with an edge from x to x·s.
(2,7)(3,10)(4,5)(9,14)(11,15)(12,13)(17,18)(19,29)(20,25)(21,26)(22,27)(23,28)(24,32)(30,45)(31,39)(33,40)(34,48)(35,42)(36,44)(37,43)(38,46)(41,47) involution — undirected(1,2,6,9)(3,11,13,15)(4,14,5,7)(8,10,16,12)(17,19)(18,24)(20,34)(21,31)(22,32)(23,33)(25,41)(26,29)(27,40)(28,39)(30,35)(36,46)(37,47)(38,43)(42,48)(44,45)(1,3,6,13)(2,8,9,16)(4,10,5,12)(7,15,14,11)(17,20,23,36)(18,25,28,44)(19,30,33,47)(21,35,22,37)(24,38,39,48)(26,42,27,43)(29,41,40,45)(31,46,32,34)(2,9)(7,14)(8,16)(11,15)(17,21,23,22)(18,26,28,27)(19,31,33,32)(20,35,36,37)(24,29,39,40)(25,42,44,43)(30,46,47,34)(38,41,48,45)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.