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