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