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