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