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