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