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