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