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