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