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