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